Result is -13 .
-8 + 3 - 8 = -5 - 8 = -13
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r=8
10x3+8=80-60+? 30+8=20+? 38=20+? 38-20=? 18=? The answer is 18.
2a+54=38 2a=38-54 2a=-16 a=-16/2 a=-8
76
No. Substitute the value 8 for x, and you have 4x +6 = 4(8) +6 = 32 +6 = 38.